kinzer



3 Sheets-Sheet 1.

@ V J. KINZER.

, MOLD.

N0.-413,674. Patented Oct. 29, 1889.

WITNESSES:

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l @b w Mwgq N. PETERS Pholo-Lill-ognphen Washingtam-DI Cr ing the core in process of formation.

UNITED STATES PAT-DENT, OFFICE.

,AAAW TAA JACOB KINZER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE KINZER & JONES MANUFACTURING COM- PANY, OF SAME PLACE.

MOLD.

SPECIFICATION forming part of Letters Patent No. 413,674, dated October 29, 1889.

Application filed March 5, 1889- To all whom, it may concern:

Be it known that I, JACOB KINZER, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered a certain new and useful Improvement in Molds, of which improvement the following is a specification.

The inventiondescribed herein relates to molds for car-axle boxes generally, but more especially to that construct-i011 of axle-box wherein provision is made for a removable sand plate or guard, and has for its object such a construction of mold as will permit of the use of a core formed in part of green sand and in part of baked sand, and of a corebar adapted not only to render the core rigid, but also to anchor and hold the core in proper position in the mold-cavity.

In the accompanying drawings, forming a part of this specification, Figure 1 is a sectional elevation of a core and core-box, show- Fig. 2 is a top plan view of the core, showing the core-bar and the supporting-plates in position in the box. Figs. 3 and4 are sectional views,

the planes of section being indicated by the lines a; 8 and y y, respectively, of Fig. 1. Figs. 5, 6, 7, and 8 are perspective views of the corebar and the supporting-plates. Fig. 9 is a side elevation of the baked-sand core. Fig. 10 is a plan view of the drag portion of the mold, the core being shown in elevation and arranged in proper position in the drag. Fig. 11 is a vertical section through the mold, a portion of the drag and core being broken away; and Fig. 12 is a perspective of a caraXle boX.

The interiors of the usual form or construction of LXl6-lOOX8S have only comparatively slight, if any, projections, and hence cores 4 for the formation of such axle-boxes can be readily made of green sand; but where the axle-boxes are slotted, as at ain Fig. 12, for the reception of a sand plate or guard, the portions of the core for the formation of said slot are of necessity made so thin and project such a distance from the body of the core as to prohibit the use of green sand in the formation of that part of the core; hence it has been customary heretofore to employ a baked- Serial No. 301,971. (No model.)

sand core for the formation of the interior of the box.

In the practice of my invention I provide a core-box having removable end pieces 1 and 1 and side pieces 2 and 2, supported by a bed-piece 3, on which the end and side pieces are held in proper position by dowel-pins or other suitable devices, as is customary. The inner walls of the end and side pieces and the upper face of the bed-plate are suitably shaped for imparting the desired contours to the core, and the end and side pieces are detachably locked one to another by catches 3, as shown in Fig. 2. The parts of the core box having been properly adjusted together, a baked-sand disk 4, adapted to form the slot at and having an opening 5 therethrough for the passage of the core-bar 6 and for the reception of a supporting-neck of green sand, as will be hereinafter described, is attached to a slotted guide-plate 7, said plate being provided with a clip 8 on one side for engagement with the upper end of the disk 4.. The guide-plate 7, having the disk 4 attached thereto, is slid into grooves 9, formed in the walls of the side pieces 2 and 2 of the core-box. The core-bar 6, whichis made considerably longer than the core, is next placed in position, being passed through openings in the end pieces 1 and 1, and the sand-supporting plates 10 to 1O adjusted in position thereon. The core-bar is provided at one end with an angular projection 11,which is provided with a notch 12 for engagement with a plate 13, secured to the end piece 1, as shown in Figs. 1 and 5, in order to prevent any longitudinal displacement of the bar, the opposite end of the bar projecting through the opening in the end piece 1 and being supported in position thereby. Along the upper and lower edges of the bar are formed laterally-projecting flanges 14 and'let", and-in the upper edge of the bar notches 15 are formed at suitable intervals, correspondingly-located notches 15 being formed in the edges of the flanges 14., said notches being designed to hold the supporting-plates 1O 10", &c., in position in the core. The plates 10 to 10, inclusive, are made of a length and width proportional to the size of the core, and are slotted, as'shown, the slots 16 being made of sufficient width to permit of the passage of the flanged core-bar longitudinally through the slots. Notches 17 are formed in the plates at the ends of the slots of a width to permit the upper edge of the core-bar to fit therein, thus holding the plates from lateral movements, their movement longitudinally of the bar being prevented by their engagement with the notches 15. In order to prevent the displacement of the lower ends of the plates, lugs 18 are formed on the side walls of the slots 16, said lugs projecting into the slots sufiiciently far to engage the notches 15, formed along the lower edge of the core-bar, as hereinbefore stated. The core and plates having been adjusted, as stated, in the core-box, green sand or other suit-able molding material is packed therein, completely inclosing the core-bar, supportingplates, and all of the baked-sand disk except the outer portions thereof, as shown in Figs. 10 and 11. Care should be taken to carefully pack the sand in the opening through the baked-sand disk hereinbefore described, as the neck of green sand thus formed prevents any edgewise displacement of the disk during the transfer of the core to and into the mold. The sand having been packed in the core-box, the surplus is struck off by passing a straight-edge along the upper edges of the sides of the box and the guide-plate 7 is withdrawn. The guide-plate 7 is made of a thickness equal to the desired thickness of the inner wall Z) of the slot at of the axle-box, so that on its withdrawal a sufficient space is left between the disk at and the body of the core for the formation of said wall I), as shown in Figs. 10 and 11. After the withdrawal of the plate 7 the sides of the core-box are removed and the core lifted from the bed-plate by means of the projecting ends of the corebar, handles 19, fitting the ends of the core-bar, being employed for that purpose, if desired. The core is then placed in the matrix formed in the drag, the points or bearings at the ends of the core fitting in seats formed therefor, and the projecting ends of the core-bar resting upon the surface of the drag, as shown in Fig. 10. Suitable cores 20, for forming the recess in the knuckle c of the axle-box, are then placed in position, as shown in Fig. 10, and the cope secured in position. As the portions of the drag and cope bearing upon the projecting ends of the core-bar are remote from the matrix, as shown in Figs. 10 and 11, the sand at such portions can be packed hard, so as to form comparatively unyielding bearings for the core-bar, thereby anchoring the core in position in the matrix. The metal having been poured and cooled sufficiently to permit of the removal of the casting, the copeislifted off and the casting removed.

In order to disengage the core-bar from the supporting-plates, so that said bar, plates, and molding material can be removed, the core bar is pressed down, thereby disengaging the plates from the-notches 15 on the upper edge of the bar, and also the lugs 18 from the notches 15 along the lower edge of the bar, which can then be drawn out longitudinally, and the plates can be removed one at a time.

By reference to Fig. 1 it will be seen that the plate 10 is located in the point or bearin g portion of the core at one end thereof, and can be easily drawn off from the core-bar before it is removed from the casting, as above stated; hence its slot 16 need be made only a little wider than the flanged upper edge of the core-bar, as shown in Fig. 8.

In lieu of forming the anchoring-extension 11 at an angle to the core -bar, it may be formed parallel therewith or in any othersuitable manner; but the angular construction is preferred, as it permits of the employment of a shorter flask and prevents the turning of the core in the mold by the upward pressure of the molten metal acting on one side of the car, thereby avoiding the employment of anchors interposed between the core and the walls of the matrix, as has been the practice heretofore. Y

In forming axle-boxes of the usual form the core may be made entirely of green sand, the core-bar and supporting-plates being employed, as above described.

The frame (shown in Figs. 1 and 2) is employed in forming the cavities in the core for the formation on the finished casting of the lugs, which hold the journal-boxes in place.

I claim herein as my invention 1. A mold for axle-boxes, having in combination therewith a core consisting of a greensand portion and a baked-sand portion molded into the green-sand portion, substantially as set forth.

2. A mold for axle-boxes, having in combination therewith a core consisting of a greensand portion and a baked-sand portion having an opening therethrough and a core-bar extending through and supporting both portions of the core, substantially as set forth.

3. A mold for hollow articles, having in combination a core consisting of a green sand portion and a baked-sand portion having an opening therethrough,'the latter being molded into and held in position by the green-sand portion, substantially as set forth.

4. A mold for axle-boxes, having in combination therewith a core, a core-bar notched as described, and extending through the core, and slotted supporting-plates, the walls of the slots constructed to engage the notches in the core-bar when in normal position, the slots being made of such dimensions relative to the core-bar as to permit the longitudinal movement of the bars through them when shifted from normal position, substantially as set forth.

In testimony whereof I have hereunto set my hand.

JACOB KINZER. \Vitnesses:

R. II. WHITTLEsEY, DARWIN S. WoLooT'r. 

